Delta tub and shower facet installed..little drip

I just installed the Delta tub and shower kit for my bathroom. It was pretty simple except for the tub spout. Took me a while but figured it out.

Now here's the problem. When I turn off the water, there's still a drip of water that comes out of the spout. I would say a drip every 2 seconds. I made sure all the connections were tight and everything was done correctly.

On a tub filler last month there was a packing washer that was installed and not needed. It prevented the divertor from fully sitting down and we need to remove it. Once that happen the drip stopped. The drip was with the hand held sprayer and not the tub spout.

Perhaps check that nothing is blocking the divertor from working properly.

If you didn't flush the lines before installing the cartridge and some grit or crud got caught against the sealing surface, you may have scored the sealing surface and the gaskets can't make a proper seal. If that's the case, you need a new cartridge. Most of the time, the water is clean enough so flushing doesn't help, but it certainly doesn't hurt! There can be all sorts of crud dislodged when first turning on a new fixture. It's probably just draining down from the shower riser, though, and everything is fine.

Checked it before. Turned the water back on from the shut off valves, then turned on the shower. Water came out for a minute or two, then I turned it off. No drips. Didn't turn on the shower yet but will let you know what happens later.

How are you turning the shower on and off? Does it have its own control valve? If so then we have been giving you advice for a different installation because you did NOT tell us how you installed the vavle.